Revert "Remove ability to specify "requires" in tsconfig"

This reverts commit 700a90f.

src/bin.ts

@@ -87,7 +87,7 @@ export function main (argv: string[]) {
     '--help': help = false,
     '--script-mode': scriptMode = false,
     '--version': version = 0,
-    '--require': requires = [],
+    '--require': argsRequire = [],
     '--eval': code = undefined,
     '--print': print = false,
     '--interactive': interactive = false,
@@ -190,6 +190,8 @@ export function main (argv: string[]) {
       : undefined
   })
 
+  const requires = argsRequire.length !== 0 ? argsRequire : service.options.requires || []
+
   // Output project information.
   if (version >= 2) {
     console.log(`ts-node v${VERSION}`)

src/index.ts

@@ -166,7 +166,9 @@ export interface TsConfigOptions
     | 'skipProject'
     | 'project'
     | 'dir'
-  > {}
+  > {
+  requires?: Array<string>
+}
 
 /**
  * Like Object.assign or splatting, but never overwrites with `undefined`.
@@ -789,6 +791,14 @@ function readConfig (
     useCaseSensitiveFileNames: ts.sys.useCaseSensitiveFileNames
   }, basePath, undefined, configFileName))
 
+  if (tsconfigOptions.requires) {
+    // Relative paths are relative to the tsconfig's parent directory, not the `dir` option
+    tsconfigOptions.requires = tsconfigOptions.requires.map((path: string) => {
+      if (path.startsWith('.')) return resolve(configFileName!, '..', path)
+      return path
+    })
+  }
+
   return { config: fixedConfig, options: tsconfigOptions }
 }